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Dava Sobel

Longitude, by Dava Sobel and William J.H. Andrews

by Derwood Hunsdale-Talbot on September 21, 2009

The True Story of a Lone Genius Who Solved the Greatest Problem of His Time Here’s the problem: Using the sky and simple instruments, ship’s captains of the 18th century could determine fairly accurately how far north or south of the equator their ships were positioned (the latitude). The sky provided few useful clues, however, […]